MicroChamber Paper is a very thin, nearly transparent interleaving paper that contains dispersed molecular traps that remove and neutralize acids, pollutants and the harmful by-products of deterioration. Place a sheet behind your photos and know that you are effectively practicing preventative conservation for your collection. It also eliminates odors such as smoke, mold, and mildew. Use MicroChamber Paper for your more valuable photos and permanent archival storage. HOW TO USE: Place an appropriate sized acid-free sheet of MicroChamber inside or behind your paper collectible or photo. The sheet does not have to cover the item 100% as acids will migrate towards the MicroChamber paper and be trapped. The MicroChamber paper will work indefinitely absorbing acid and neutralizing odors.